Printing-machine.



1:. H. OOTTRELL. v

PRINTING MACHINE.

APPLICATION IILBD JUNE 21, 1912.

Patented Sept. 9, 1913.

2 SHEETS-SHEET 1.

- I I 1 I I I v I v u 1 1 E. H. GOTTRBLL.

2 SHEETS-SHEET 2.

Patented Sept. 9, 1913.

PRINTING MACHINE APPLIOATION FILED JUNE 2-1, 1912. 1,072,703.

UN 1 TED STATES PATENT OFFICE. mic-Ann. comment, or new YORK, N. Y., nssrenon TO 0. B. co'r'rnnnn esoNs con- PANY, or NEW'YORK, N. Y., A conronarion or EW JERSEY.

- PRINTING-smegma.

- To all whom z't-may concern:

Be it known that I, Enema H. CO'I'IRELL, a

citizen of the United States, and resident of the borough of Manhattan, in the city and State of New York, have invented axnew and useful Improvement in Printing-Machines, of which thefollowing is' a specification.

' sidered, is to provide means for subjecting a plurality of shifting tympans to variations in pressure, whereby they will be ef-' fected by one pressure while in their fixed positions and by another pressure during their shifting operation.

More specifically considered, the inven-v tion contemplates the provision of mechanism for holding one or more tympans tightly against the cylinder by suction for a predetermined number of revolutions while its. or their surface or surfaces are printing, and for blowing the said tympan or tympans away iirom the cylinder during its or their -shifting operation; whereby the tympans are prevented from slipping when in their fixed positions while the shifting thereof is materially facilitated.

A practical embodiment ofmy invention is represented in the accompanying draw- I I one or more tympans tightly against the surfaces of" the cylinder, and when, on the ings, in which Figure 1 represents an end view (parts being removed) of a portion of an impression cylinder and frame showing the tym-- pan shifting mechanism and part of-the mechanism for controlling the pressure on the tympans, together with the compressed air tank and suction pump, Fig. 2 represents a side view of the same and adjacent parts for carrying out this invention, por

tions being broken away to more clearly show the parts beneath, Fig. 3 represents a detail section taken in the plane of the line A-A of Fig. 2,,looking in the'direction of the arrows, Fig. 4 represents a detail section taken in the plane of the line BB of Fig. 2, looking in the direction of the arrows, parts being broken away, Fig. 5 represents a detail section taken in the plane of the "line CC of Fig. 4, looking in the direction of the arrows, without the parts broken away, Fig. =6 represents a section taken in the plane of thel-ine D-D of Fig.

Specification of Letters Patent. Applicationfiled June 21, 1912. Serial m3. 705,0.

2, looking in the direction of the arrows,

and Fig. 7 represents a detail section show- 1ng one of the grooves in the cylinder for sub ecting the tympans to variations in air pressure.

The impression cylinder is denoted by 1 and its shaft by 2, which latter is journaled iii a suitable frame 3. The usual blankets 4 are interposed between the surtacc'of the cylinder and the shifting tympans 5: and Well known mechanism is provided for periodically shifting the tympans. The

particular form of said shifting mechanism,

illustrated in the accompanying drawings,

is shown .in United States Letters Patent No. 996902, granted to H. .M. BarbenJuly 4, 1911, and hence will not be described herein as its specific form constitutes no part of thepresent invention.

. The periphery of the cylinder 1 is provided at desired intervals throughout its length, for instance at points where they Willengage the tympans in line with the aten'ted Sept. 9,

margins on the printed sheets, with laterof the passages 6 and-perforated plates 7,

the creation of a partial vacuum within one or more of the sa d passages, will draw other hand. the air pressure is raised above normal-within one or more'of said passages,

the air passing through the perforations S will serve to blow the tynipans away from their en agement' with the cylinder.

The lllb of the cylinder 1 is provided with four longitudinally disposed bores 9 parallel with respect to the axis of. the cylinder, which bores are open at one end of the cylinder for communication with four passages 10 in the yalve seat 11 which is arranged to rotate with the cylinder 1. These passages 9 arecoiineeted by means of radial passages 9* with the segmental passages 6 in the periphery of the cylinder 1.

Four radially acting slide valves 12 are mounted on the valve seat 11 with their ports 13 in alinement with. the passages 10, in the valve seat 11, the said valves being held in operative positionby' the port disk 14, which is secured to the seat 11 by bolts 15. This disk 14 is provided'with eight short.

arcuate ports 16 arranged in sets of format difl erentradial distances from the ax1s of the cylinder 1, the said ports being adapted to register with the ports 13 in the valves 12.'

A port Bing 17-is-secured against rotat on on the frame 3, which ring 1s provided with inner and outer segmental port chambers 18 and 19, respectively; the said inner chamber 18 being so radially located as to register with the inner set of ports 16 in the port disk 14; while the outer chamber 19 is arranged to register with the outer set of ports 16 in the port disk 14. The inner port chamber 18has an open communication with a hollow boss 20 located on the periphery of the .portring 17; while the outer port chamber19 iscorrespondingly in communication with a similar hollow boss 21 also located on the periphery of the port ring 17 in diametric opposition to the boss 20.

The slide valves 12 have a pivoted en gagement attheir outer portion with one end of'a bell crank 22 which 'is centrally pivoted at 23 inv a lug 24 on the valve seat 11;- the other extremity of the bell crank '22 havinga pivotal engagement at 25 with a laterally extending spur on a rocking pawl lever 26 which is fulcrumed at 26*. Thisrocking pawl lever 26 is part of the.

tympan shifting mechanism shown in United States Letters Patent No. 996,902 referred to above, and isacted uponat one end by an expansion spring 27 for normally holding its pawl teeth 28 in .engagementwith the ratchet. wheel 29, while the usual circular track 30 serves to engage theshoe 31 at.

periodic intervals for disengaging the pawl lever .26 from the ratchet 29 during the shifting of the tympan,

The hollow boss 21 on the port ring 17,]

which is in communication withthe outer port chamber19, is connected by means of a pipe 32 wrtha-source of compressed 'air 33;'while thejopp'ositely disposed hollow boss 20 is connected by meansof a pipe 34 I with an exhaust pump or fan 35, which exhaust pump is connected with the compressed air tank 33 by a pipe 36. The pipe 34 is provided with a suction valve 37 so that the vacuum pump 35 may suck' in air when communication is cut ofi between the pipe 34 and the passages .6 in the cylinder 1.

The valve seat 11 and portdisk 14 are secured to the cylinder '1 and rotate therewith; while the port ring 17 is secured to the frame 3 by the pipes 32 and '34 passing in to the bosses 20, 21, and expansion springs 38, sprround the pipes 32 and 34 be i tweenthe frame 3 and the bosses 20 and 21 for firmly holding the port ring 17 against the port disk 14 on the cylinder 1.

The operation of the device is as follows: 1

When a tympan is about to be shifted, the

i 1,072,7oe

'circular'traclr 30 engages the" shoe 31 on the rock pawlnlever 26 thereby rocking the said lever and disengaging the' teeth 28 from the ratchet wheel 29. This. rocking of the lever'26 also rocks the bell-crank 22 6 about fis pivot 23 and causes the corrc sponding valve .12 to be moved radially away from the axis of the cylinder, until its port 13 registers, with the proximate 'end 19* of the port chamber .19 in the valve ring 17 thereby opening communicationfrom the source of compressed air 33 through the pipe 32, hollow boss 21, port chamber 19, outer port 16, port 13,, passage 10, passage9, and passages 9 5, to the seg mental passages 6 in the appropriate quadrant'of the cylinder 1, thus permitting the compressed air to spurt through the holes 8 in the plate 7 and below the corresponding tympans away from the surface of the cylinder, for facilitating .the shifting of the said tympans. The. shifting of the tympan 1, so that at the time the tympan mechanism is about-to tighten the tympan again on the cylinder, the'port 13 in'the valve 12 is moving oil' of the other, end of the port chamber 19 thus closing off the communicatakes about half a revolution of the cylinder tion'l fromthe source of compressed air 33 to the passages 6, and hence permitting the tympan. tightening mechanism to readily tighten the 'tympans on the cylinder. This actuation of the tympan tighteningv mechanism results from the isengagcment of the circular track 30 and the shoe 31 whereby the spring 27 may force the teeth 28 on the. lever 26 into engagement with the ratchet wheel 29. This movement of the pawl lever 26 by-the spring 27 also rocks the bell crank 22 so as to force the corresppnding slide valve 12 inwardly thus "bringing its port 13 at the same radial end 18* of the port chamber 18 thereby opening communication from the exhaust fan or pump 35, through the pipe 34,.hol-

low boss 20, port chamber 18, inner port 16,

port 13, passage 10, port 9 and passages 9*, to the segmental passages 6 in the periphery of the cylinder 1, thus causing a artial vacuum in the passages 6. The (11' erence in pressure against the tympan caused by this partial vacuum holds the tympan tightly against the surface of the cylinder during the printi operation, or untilit lSfigflln time to shi the said tympan.

s a *fi-xe'dand' to another pressure when shifting.

a rwaves It will be understood 'that 'theabo e -de- --seription refers merelyflto one quadrant of the cylinder 1 and its correspondingtyn pa-n.

' have-provided 'meehanismi for firmly holding- 'tympans-ins plaee during the printing operations-and for greatly-facilitating the shifting"o'f= the said 'tympans, zwhieh mechanism is-simple andisiautomaitieally controlled by the mechanism which shifts the tymp ans.

-It is to be understood that perforations e15 corresponding to--the "holes'8 in the-plates 7 are formed through the blankets-or in packing that ma-y be on the cylinder under the tympans -so-as to insure the subjection of -the tympans to the suction and blowing -acs 0 tion hereinabove described. -'It will also'be understood that various changes may be .made in the forum-construction and opera- '-tion-'of-the several parts without departing from the spirit-and scope of my invent-ion;

1 =hence I donotw-ish 'tolimit myself strictly to-tl1estructure hereinTset-forth, :but

WhaflItlairriis-z- 1. In combination,*a-cylinder aplurality o'f-tynipans thereon, and "a common means e "for-holding the tympans againstthe cylinder by suction.

2. In combination, a cylinderya plurality of shifting tympans thereon and a common means for'hol'di-ng the tympans againstsaid cylinder-by-suetion; 1 p a y 3."In combina ion, -a cylinder, -a plurality of tympans thereon-and a common tympan holding device comprising an'exhaust pump and --means for automatically bringing the eirfhaust-pump into and out of operative reflationwlth respect to the 'tympans.

4. In combina'tiom-a cylinder, :a plurality ofshifting tympans thereon, and" a common "tympan holding device comprising an exhaust pump and means for automatically bringing the exhaust pump into and out of operative relation "with respect to "the tympans.

'35 $111 combination a cylinder, a shifting z'tympan thereon and means forsubjecting "the tympan'to' one pressure While fined and to another pressure When-shifting.

=6. Imcofl'xbi-nafion, acylinder, a plurality er shiftingtympans'thereon and means for subjecting the tympans toone pressure While '7. {In combinationpa cylinder, 'a' shifting tympan'thereon and means 'for subjecting the tyinpanto suction "while "fixed and for removing the suction when shifting.

8. In combinatio-macylinder, a plurality otsliitting mpans-thereon'and means for subjecting t e tympans iIO ISUCti'OIi -vv hile' fixed and for-removing 'thesuction when 155 shifting.

9. In combination, a cylinder, a shifting fftympan thereon, and means for blowing the tympan-ayvay *the cylinder during the shifting operation. 7

10. In-eombinatioma cylinder, a plurality -of shiftingtympansthereon and means for blowingthe tympans away *from the cylinder-during. the shiftingoperation;

11. In combination, acylinder, a-plurality of 'shifting't-ympans thereon, and a common means 'for blowing the tympansaway from'the cylinder during the shifting opera; tion.

' =tympan thereon, and means -for holding the tym-pan against the cylinder, by suction and for blowing the tympa n away from the cylinder during-the'shifting operation.

-df-shi fting'tympans thereon and means for suction While fixed 'and for blowing the '14. In combination, a cylinder, a shifting tympan thereon and a tympan holding dey-ice 'eomprisin'g an 'exhaust pump, a comcally bringing-theone orthe other into op- -erati verelationwith respect to the tympan.

1 5. In combination, a cylinder, a shifting 'tympan thereon and a tympan holding device comprising e 1 eriforate'd tube on the periphery of thecyhnder under the t-ympan, an exhaust pump and means for automatically bringingthe pump into and out of predetermined intervals.

- 16.- In eombination,=acylinder, a shifting tympan thereon and 1a,. tympan holding device. comprising a perforated tube on the periphery of the eyhnder under thetympan, an exhaust "pump, aqeompressed air tank and means or:=wutomatically bringing the cation-with saidperforated tube at predetermined intervals.

'17. In'eom'bination, a cylinder, a plurality of shifting tympani; thereon and a tympan holding device-comprising an exhaust pump andmeans "for automaticallybringing the exhaust pum into operative relation with respect to-eac of the said tymp'ans. n p

18. 'In combination a cylinder,-a plurality ots'hir'ting'tympans thereon and a tympan holding device'comprisingan exhaust pump, a compressed air tank and means for automaticall bringing-the one or the other into operati e'relation with respect to eachofthe said tympansl a v '19,, In combination, a cylinder, a plural ityof-shifting-tympans thereon and :a tym: pan holding (device Y comprising perforated -;passa'ges m the periphery of-the cylinders under} thewympans, an exhaust pump and 1'3. In 'eom'bin'ationga cylinder, a plurality pressed air tank, and means for automati communication-with said perforated tube at "one -and theother into and out of eommuni-.

12. In combination, a cylinder, a shifting holding the tympansagainst the cylinder by 1 tympans awa-yttrom the cylinder when shittiao means for automatically bringing the p ump into and out of communication Withsaid perforated passages at predetermined in tervals.

20. In combination, a cylinder, a plurality of shifting tympans thereon and a'tym-- pan holding device comprising perforated .mssagesi in the peripheryof the cyllnder under the tympansaan exhaust. pump, a

tervals.

21. In combination, a cylinder, a shifting tympan thereon and means "for subjecting the ,t unpan to one pressure during a predetermined number of revolutions of the cylinder while the tympan is fixed and to another pressure while the tympan is shifting. a

22. In combination, a cylinder, a plurality'of shifting tympans thereon and means for subjecting each of the tympans to the one pressure during a predetermined number of revolutions of the cylinder while the tympan is fixed and to another pressure while the tympan is shifting.

23. In combination, a cylinder, a shifting tympan thereon and-means for subjecting the t ympan to suction during a predeter-.

mined number of revolutions of 'theicylindcr while the tympan is fixed and for removing the suction While the tympa'n is shifting.

24. In combination, acylinder, a plurality of shifting tympans thereon and means for subjecting each of the tympansto suc- 7 tion during a predetermined number of revolutions of the cylinder while the tympan is fixed and-for removing the suction while the tympan is shifting.

25. In combination,,a cylinder, a shifting tympan thereon and means for-blowing the tympan away from the cylinder every predetermined number of revolutions of the cylinder during the shiftingoperatiou.

26. In combinatioln-a cylinder, a plurality of shifting tympansthereon and means for blowing each of the tympans away from the cylinder everyv predetermined number oi revolutions of the cylinder during the shifting operation.

27. In combination, a cylinder, a shifting tympan thereon-and means for subjecting thetympan to suction for a predetermined number of revolutions of the cylinder while the tympan is fixed and for blowing the tympan away from the cylinder when the tympan is'shifting.

28. In combination, a cylinder, a plurality of shifting tympans thereon and means for subjecting each of the'tympans'to suction for a predetermined number ofrevo- .lutions of the cylinder while the tympan is subjecting the tympan'to-one pressure while I vthe tympan is fixed and, to another pressure while the tynipan is'b'eing shifted.

30. Incombination, a cylinder, a plurality of shifting tym ans thereon, means for automatically shifting the tympans ever'y predetermined number of revolutions of the cylinder and means controlled by the tympan shifting means for subjecting the-tympans to one pressure While the-tympans are fixed and to another pressure whilethe tym-' pans are being shifted.

31. In combination, a cylindeiya tympan thereon, means for automatically shifting the tympan every predetermined number of revolutions and means controlled bythe tympan shifting means for subjecting the tympan to suction while thetympan is fixed and-for removiugthesuction While the tympan is being shifted. j

32; In combination, a cylinder, a plurality of tympans thereon, means for auto: matically shifting the tympa'ns every predetermined number of revolutions of the cylinder and means controlled by the tympan shifting means for subjecting the tym- I pans to suction while thc tympans are fixed and for removing the suction while the tym pans are being shifted.

In combination, a cylinder, a tympan thereon, means for automatically shifting the tympan every predetermined number of revolutions-of the cylinder and means controlled by the tympan shitting means for blowing the tympan away from the cylinder when the tynipa-n .is being shifted. f

34. In combination, a cylinder, a plural-- ity. of tympaus thereon, means ,for automatically shifting the tympans every predetermined number of revolutions of the cylinder and means'con'trolled by the tympan shifting means for blowing the tym pans away from the cylinder when the tympans are being shifted. p

35. In combination, a cylinder, a tympan the tympan every prtulelermined number of revolutions of the cylinder and means controlled by the tympau shifting means for subjecting the tympan to suction while the tympan is fixed and for blowiug the tympau away from the cylinder when the tympan'isbeing shifted.

36. In combination, a cylinder, a plurality of tympans thereon, means for. automatically shifting the tympans every predetermined number of revolutions of the 'tliereon, means for automatically shifting cylinder and meanscontrolled by the tymasmy invention, I have signed'm y name nan shiftin means for sub'ectin the t min ')I6SGI1C6 of two Witnesses this ei hbeenthpans to suction while the tympans are fixed day of June 1912.

and for blowing thetympans away from the EDGAR H. COTTRELL. cylinder when the tympans are being Witnesses shifted.

F. GEORGE BARRY, I31 testimony, that I elannthe foregolng HENRY C. THEME.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. O. 

